What happened to the front page mobile CSS?

This post title has caused it:

https://news.ycombinator.com/item?id=20341855

Shameless plug: you know what doesn’t rely on faulty style sheets? Native apps! Give Octal for iOS a shot.

https://apps.apple.com/us/app/octal/id1308885491

I noticed it also, small text. (iPhone)

Also in Firefox, on Android.

Yes, on my iPhone as well!